During the Qin Dynasty, the project of building a large network of roads and canals was initiated. This project was a significant infrastructure endeavor undertaken to improve transportation and communication throughout the empire.
Another project that was started during the Qin Dynasty was the domestication of horses and the invention of the stirrup. These developments in animal husbandry and military technology were aimed at enhancing the effectiveness of cavalry warfare.
Therefore, the projects begun during the Qin Dynasty include:
1. Building a large network of roads and canals
2. Domesticating horses and the stirrup